Crank handle



Patented Got. Z4, 1922.

HARVEY C. NEWCOM, OF GREGORY. SOUTH DAKOTA.

CRANK HANDLE.

Application filed March 20, 1922.

To all whom t 'may concern:

Be it known that I, I-IARvnY C. NnwcoM, a citizen of the United States, residino` at Gregory, in the county of Gregory and tate of outh Dakota, have invented new and useful Improvements in Crank Handles, of which the following is a speciiication. n

In carrying out the present invention 1t is my purpose to provide a crank handle which will be found especially useful in connection with the cranks used on hand operated churns, washing machines, automobiles, etc., and wherein the handle will be connected with the crank arm that such handle may be readily and conveniently swung to active and inactive positions whenever desired.

It is also my purpose to improve and simplify the general construction of crank handles of the class described and to provide a crank handle which may be readily and quickly attached to the crank arm, so that in the event of the breaking of one crank handle a new one may be substituted therefor.

Furthermore7 I aim to provide a crank handle which may be manufactured and marketed at small cost and whith will embody comparatively few parts and these so arranged and corelated as to reduce the possibility of derangement to a minimum.

lWith the above recited objects in view, and others of a similar nature, the `invention resides in the construction, combination and arrangement of parts set forth in and falling within the scope of the appended claims.

In the accompanying` drawings:

Figure 1 is a view in side elevation of a crank handle constructed in accordance with my invention, the same being shown as applied to the lower end of a crank arm. v

Figure 2 is a longitudinal sectional view therethrough showing the crank handle 1n active position.

Figure 3 is a similar view showing the handle in inactive position.

Figure f1 is a sectional view on the line 4 4 of Figure 1.

Figure is a sectional view on the line of Figure 1.

Referring now to the drawings in detail, 1 designates the handle end portion of the crank arm. In accordance with my invention the lower end of the crank arm 1 is formed with a transverse bore 2. Extend- Serial lTO. 545,322.

ing through the bore 2 is a threaded shank 3 and threaded upon one end of the shank 3 is a nut 1. The other end of the shank 3 projects beyond the crank arm 1 and is bifurcated to provide forked arms 5. Surrounding the bifurcated end of the shank is a casting or housing 6 formed with a longitudinal slot 7 and the outer end of the casting is formed with an opening 8 contiguous to the slot 7.

9 designates a hand grip which, in the present instance, comprises a shank 10, one end of which is flattened, as at 11,' and ez;- tends through the opening 8 and into the space between the biit'urcated arms 5. This flattened end of the shank is pivoted to the arms 5 by means of a pivot bolt 12. In the present instance the pivot bolt 12 extends through the opposite side walls of the housing 6 and cooperates with the nut 4 to hold the shank 2 securely7 to the lower end of the Vcrank arm 1, as clearly illustrated in Figures 1, 2 and 8 of the drawings. Ilncireling the shank 10 beyond the housing 6 is a sleeve 13 having its outer end enlarged, as at 14, and formed with a recess 15 in which is seated the head 16 on the shank 10, the head 16 acting to prevent accidental detachment of the sleeve from the shank.

` The top wall of the housing G adjacent to the opening 8 in the outer end of such housing is formed with a slot 17 and pivoted within the slot 17 scissors-fashion are levers 18. The inner ends of the levers 18, that is to say, the ends of the levers within the housing 6, are formed to provide clamping jaws 19, while interposed between the outer ends of the levers and connected thereto is a coiled expansion spring 20 that acts to hold the jaws in closed position.

In practice, when it is desired to swing the crank handle to active position, as shown in Figure 2, from the position shown in Figure 3. the shank 10 is swung upwardly through the slot 7 and into the opening S, and in this position the shank 10 of the hand grip is at right angles to the crank arm 1. In the upward movement of the shank 10 the shank enters the jaws 19, as clearly shown in Figure 4; of the drawings, and is effectivelyv clamped by the jaws 19 under the action of the spring 20, so that the hand grip will be maintained in active or cranking position. To render the hand grip inactive the latter is pushed downwardly, thereby disengaging the jaws 19 and gravitates to the position shown in Figure 3 of the drawings.

ln the event that the shank 10 does not leave the jaws 1S) when a downward pressure is exerted on the hand grip the outer ends of the levers 18 may be swung together against the action of the spring 20, thereby assuring the i'elease of the hand grip.

l haveentei'ed into a detailed description of the construction and i'elative arrangeinent of Darts embraced in the present and lliieferred embodiment of my invention with a view to imparting a full, clear and exact understanding of the said embodiment. l do not desire, however, to be understood as coniiningniyself to the said specific construction and relative arrangement of parts, inasmuch as in the future practice of my invention such changes or modifications may be made as fairly fall within the scope of inv 4invention as dei'ined bv in v appended claims. i

l'laving thus described the invention, what is claimed as new, is

l. The combination with a crank arin having an opening formed in thelower end thereof, of a shank extending through said opening and secured thei'ein and having one end bifur'ated to provide forked ai'ms ai'- ranged at right angles to said crank arin.v a hand grip embodyingI a shank having one end pivoted between said arms. a sleeve on saidA shank bevond said ai'ins, a housing sui'- rounding said bifurcated ainis and formed with a lslot in its lower portion and opening in its outer end th roughwhich said hand grip may be swung to active and inactive positions, and ineans carried by said housing and engageable with said shank to hold said hand grip in active position.

2. The combination with a crank arin having an opening formed in the lower end thereof, of a shank extending through said opening and secured therein and having one end bifui'cated to provide forked arms arranged at right angles to said crank arin, a hand grip embodying a shank having one end pivoted ybetween said arms, a sleeve on said shank beyond said arms, a housing sui'- rounding said bifurcated arms and formed with a slot in its lower portieri aiidopening in its outer end through which said hand grip may be swung to active and inactive positions, said housing having the uppei' surface thereof formed with a slot contiguous to the openingl in the outer end thereof and jaws pivoted within said slot and engageable with said shank to hold said hand grip in active position.

23. rlhe combination with a Crank arm havinb an openingl foi-ined in the lower end thereof, of a shank vextending' through said opening and secured therein'and having one end bifuroated to provide forked arms arranged at right angles to said crank arm, a hand grip eii'ibodying a shank having one end pivoted between said ai'ins, a sleeve on said shank'bevond said arins, a housing surrounding said bifurcated arins and formed with a slot in its lower portion and opening in its outer end through which said hand grip may be swung to active and inactive positions. said housing having the upper surface thereof formed with a slot contiguous to the opening in the outer end thereof and jaws pivoted withiii'said slot and engageable with said shank to hold said hand grip in active position, and spring' associated with said jaws and holding the latter normally in clamping position.

el. The combination with a crank arm having an opening formed in the rlower end thereof, of a shankextending through said opening and secured therein and having one end bifurcated to provide forked arms arranged at right angles to said crank arm, a hand grip embodying a shank having one end pivotetl between said arms, a sleeve on said shank beyond said arms, a housing sui'- rounding said bifurcated arms and formed with a slot in its lower portion and an opening' in its outer endthrough which said hand grip may be swung to active and inactive positions, means carried by said housing and engage'able withsaid shank to hold said hand grip in active position, and a pivot bolt extending through said housing, bifurcated arins and the inner ends of said shank and acting` to hold said housing in proper position and said shank between said arms.

ln testimony whereof I ai'iiX n'iv signature.

HAR-VE Y VCOM. 

